Personally I object to the APSL because of Apple's right to withdraw it if there is a claim of infringement. The problem is that this means that the janitor's mother-in-law could say "I think the whole thing infringes" and the entire source code would be withdrawn; the license doesn't require that the claim be one which is made in court. (And the clause requiring Apple to un-withdraw the rights if they win in court doesn't apply if it never _goes_ to court.) But I'm a layman with no legal training whatsoever.
